Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos pontos contra têm uma derrota de 13?
 ###Tabelas: CREATE TABLE formation_of_the_1st_arkansas_state_troops (formation_of_the_1st_arkansas_state_troops_id AUTO_INCREMENT PRIMARY KEY, Company VARCHAR, Name VARCHAR, County VARCHAR, Militia Regiment VARCHAR, Commander VARCHAR, Organization Date VARCHAR) CREATE TABLE singles:_16_4_titles_12_runner-ups (singles:_16_4_titles_12_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score VARCHAR) CREATE TABLE 1980s:_hat_tricks (1980s:_hat_tricks_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Competition VARCHAR, Round VARCHAR, Opponent VARCHAR, Home VARCHAR, Away VARCHAR, Series VARCHAR) CREATE TABLE league_table (league_table_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Played VARCHAR, Won VARCHAR, Drawn VARCHAR, Lost VARCHAR, Points for VARCHAR, Points against VARCHAR, Points difference VARCHAR, Bonus Points VARCHAR, Points VARCHAR) CREATE TABLE croatia (croatia_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Pos. VARCHAR, Height VARCHAR, Weight VARCHAR, Date of Birth VARCHAR, Club VARCHAR)  
SELECT Points against FROM league_table WHERE Lost = 13